摘要
经多年对阿哈水库Ｆｅ，Ｍｎ污染的研究表明，Ｆｅ、Ｍｎ分布随着季节变化、水库水温分层而变化，呈现明显的垂直分布规律，高浓度Ｆｅ、Ｍｎ主要出现在水温分层期水库中、下层，与库底缺氧、ｐＨ下降、沉积物中的Ｆｅ、Ｍｎ向上覆水释放造成的二次污染等密切相关．为自来水厂优化分层取水提供了依据．
Distribtuion of Fe and Mn along vertical profile in Aha Reservoir, a seasonal oxygen shortage water body with stratificated temperatures, was studied for evaluation of optimal pumping depth of a water supply plant. It was revealed that Fe and Mn distribution varies with different seasons and water states and show a typical vertical distribution. In summer and autumn, water of reservoir is stratificated. Upper stratum is in oxygen enriched status, at which Fe and Mn concentrations are less than 0.3mg/L and 0 1mg/L respectively. The effect of oxygen shortage in middle and lower states of the wather leads to release of Fe and Mn in deposit sediment to super jacentwater. The effects of bioturbation as well as changes of hydraulic factors lead to acceleration for release of interstitial water to reservoir water through resuspended the suspended particle in deposit sediment. As a consequence, high concentrations of Fe and Mn in middle and lower strata of water are emerged. The concentrations of Fe and Mn pumped by a water plant is high since the pumping inlet is set in lower stratum of reservoir and would be reduced by moving the inlet to optimal stratum.
出处
《环境科学学报》
CAS
CSCD
北大核心
1999年第2期147-152,共6页
Acta Scientiae Circumstantiae
基金
贵州省"八.五"攻关课题
关键词
垂直分布
季节性缺氧
分层取水
水库
铁
锰
vertical distribution, stratification, water temperatures, oxygen shortage, pumping, Fe, Mn.
